County annual report · FIPS 47155
2021 Sevier County, TN Power Outage Report
In 2021, customers in Sevier County, TN went without power for an average of 3.3 hours, a total of 234K customer-hours (Tennessee average 3.7 hours). That ranks 39th worst of 84 Tennessee counties and 1757th of 2,974 nationally.
Compared with TN, the US and 2020
Coverage line is EAGLE-I's share of Tennessee customers tracked each year.
Biggest outages in Sevier County, 2021
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | February 22, 2021 08:15 | February 23, 2021 02:45 | 18h 30m | 3,863 | 10K |
| 2 | August 26, 2021 21:00 | August 27, 2021 03:45 | 6h 45m | 3,812 | 2,883 |
| 3 | December 11, 2021 10:30 | December 13, 2021 18:45 | 2d 8h | 2,908 | 21K |
| 4 | June 3, 2021 00:45 | June 3, 2021 03:00 | 2h 15m | 2,751 | 2,236 |
| 5 | July 26, 2021 19:15 | July 27, 2021 01:15 | 6h | 2,608 | 4,765 |
| 6 | October 7, 2021 04:00 | October 7, 2021 06:15 | 2h 15m | 2,570 | 2,647 |
| 7 | May 9, 2021 17:45 | May 10, 2021 19:30 | 1d 1h | 2,540 | 8,337 |
| 8 | November 12, 2021 01:45 | November 12, 2021 07:45 | 6h | 2,442 | 9,045 |
| 9 | July 18, 2021 11:30 | July 18, 2021 22:15 | 10h 45m | 2,410 | 13K |
| 10 | February 16, 2021 21:15 | February 17, 2021 06:15 | 9h | 2,356 | 6,798 |
Outage episodes by size in 2021: 143 reached 100+ customers, 29 reached 1,000+ customers, 0 reached 10,000+ customers.
Utility reliability filed with the EIA
SAIDI (average outage time per customer) and SAIFI (average interruptions per customer) that utilities serving Sevier County reported on EIA Form 861 for 2021, or their most recent earlier filing. Utility-wide figures, not county-specific.
| Utility | EIA year | SAIDI | SAIFI | SAIDI excl. major events | SAIFI excl. major events |
|---|---|---|---|---|---|
| Knoxville Utilities Board | 2021 | 2.4 hrs | - | 1.9 hrs | - |
| Appalachian Electric Coop | 2021 | 3.3 hrs | 2.57 | 3.3 hrs | 2.57 |
| Sevier County Electric System | 2021 | 3.7 hrs | 2.10 | 3.2 hrs | 2.00 |
| City of Newport - (TN) | - | - | - | - | - |
About this data
- Outage figures come from DOE/ORNL EAGLE-I, which records customers out by county every 15 minutes. EAGLE-I tracked about 73% of Tennessee's customers in 2021; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 71,320 customers (ORNL modeled county customer count), including major storm days. It is comparable across counties but is not the SAIDI a utility files.
- An outage event is a continuous stretch with customers out; counts at 100, 1,000 and 10,000+ use its peak.
- Years loaded: 2015–2025. Sevier County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Sevier County, TN annual power outage report, 2021, data as of Oct 3, 2026 02:41 UTC, sources: DOE EAGLE-I (https://eagle-i.doe.gov/); EAGLE-I modeled customer counts (MCC) (https://figshare.com/); EIA Form 861 (utility reliability) (https://www.eia.gov/electricity/data/eia861/). https://massoutage.com/reports/2021/tennessee/sevier-county